The correct answer is A) Governments regulate the minimum age of workers.
The scenario that was a common social reform that occurred during the 19th and 20th centuries was "Governments regulate the minimum age of workers."
The most important piece of legislation that regulates that restricts the hiring of children in the labor place was the Fair Labor Standards Act of 1838. This act prohibited the hiring of children, created the right of a minimum wage and regulates on overtime pay when the worker had to work more than normal work hours.